Kontract Killer,
How appropriate for you to use that name! You actually are killing your own contract with your work. You know it, we know it, that's it and that's all. Training guys and gals that put downward pressure on your own wages is just plain dumb.
You got one thing right though. I am a wannabe. I'd like to be trainer, but I would never volunteer for it (asked or not) under the current conditions. You are quite literally making yourself a minority as an expat on full housing. You will soon be outnumbered by those you trained to the line. What do you think the future of housing will be at that point? A scalers made the same mistake. How many of those are there left? Maybe you were/are one. If so, you're a really slow learner.
Forget about pay rises. Housing is the only thing we have which is even remotely indexed to inflation. Bye bye! Maybe it will be easier to get those tiny HDP driven pay rises once housing is gone. Whew, what a relief!
Tell yourself all those lies if it makes you feel better, but you need to get a f"""""g clue if you are believing your own BS.